Parker PPB6TMC4 Tube Stem Adapter 3/8 X 1/4 in Od

Product Description

The PARKER PPB6TMC4 is a push-to-connect tube stem adapter designed to transition between two different tube sizes in fluid and pneumatic plumbing systems. It connects a 3/8-inch OD tube to a 1/4-inch OD tube without threading or soldering. The body is molded from polypropylene, giving it solid chemical resistance for use in water, light chemical, and general-purpose pneumatic lines. Rated to 150 psi, it suits a wide range of low-to-medium pressure applications. Plumbers, HVAC technicians, and industrial maintenance technicians install this fitting during system assembly or repair to reduce tubing sizes at a junction point.

This adapter is used in residential and light commercial plumbing, HVAC condensate lines, compressed air distribution, and fluid transfer systems where polypropylene is an acceptable tube material. The push-to-connect design allows fast, tool-free tube insertion, making it practical for tight spaces or quick field repairs. It accepts standard OD tubing and is suited for both new installations and retrofits where a size transition is required mid-run.

Key Features

• Push-to-connect design allows tool-free tube installation and removal
• Transitions 3/8-inch OD tubing to 1/4-inch OD tubing in a single fitting
• Polypropylene construction provides chemical resistance and corrosion immunity
• Rated to 150 psi for low-to-medium pressure service
• Compact form factor suits confined installation spaces

Compatibility

Designed as an OEM-style push-to-connect replacement or new-installation fitting for systems using standard OD polypropylene or compatible semi-rigid tubing in 3/8-inch and 1/4-inch sizes.

Installation Notes

Depressurize and drain the line completely before removing or installing any push-to-connect fitting. Cut tubing square and deburr the end before insertion to ensure a proper seal. Verify that the tubing OD matches the fitting size exactly, as undersized or oversized tubing will not seal correctly. Installation does not require special tools, but confirm the system pressure rating does not exceed 150 psi under operating conditions.